Olatunde and Ayodeji Odunyemi, both of Kennington, and Afolayan, of Clapham, all denied murder and an alternative count of manslaughter.

The brothers were cleared after they insisted they had no idea Mr Kamara was to be attacked and played no part in the stabbing.

Afolayan said he had attacked the victim with a belt buckle and not a knife but was convicted of murder.

He will be sentenced on Thursday.

Detective Inspector Edelle Michaels from the City of London Police’s Major Crime Team said: "What started as a fun evening out with friends quickly turned nasty and as a result of a mindless act of violence, a young father lost his life and a child will grow up without a father.

"Our detectives worked hard trawling through CCTV and mobile footage piecing together what happened that night which has led to this result today.

"Crimes like these are extremely rare in the City and we will continue to work with our local licensed premises to prevent anything like this from happening again.

"Our thoughts are with the family during this difficult time and we hope today’s verdict in some way helps them towards a sense of closure."